not suspected or believed likely; "remained unsuspected as the head of the spy ring"; "he was able to get into the building unspotted and unsuspected"; "unsuspected difficulties arose"; "unsuspected turnings in the road"
a piece of land prepared for playing a game; "the home crowd cheered when Princeton took the field"
the circumstances under which competition occurs; "the government's objective is to insure a genuinely level playing field for American industry and commerce in Europe"